View Full Version : Manta rays have an unusual mouth filter that resists clogging

09-26-2018, 07:12 PM
SMOOTH SWIMMER The giant oceanic manta ray (Manta birostris) captures plankton by swimming with its mouth open. New research reveals just how the animal filters out a meal from a mouthful of seawater.

The aerodynamic ocean dwellers efficiently separate plankton from seawater using a previously unknown kind of filtration system that resists clogs and captures tiny bits of plankton, researchers report September 26 in Science Advances.

Mantas are filter feeders, like many other ocean creatures. They pull plankton-laden seawater into their mouths, where arrays of cartilaginous fibers helps them swallow the plankton but release the seawater. For most filter feeders, the process can be compared to straining a pot of pasta and letting the water run through, says coauthor Misty Paig-Tran, a marine biologist at California State University, Fullerton. But for mantas, that analogy doesnít quite work. Some of the plankton that mantas eat is small enough to slip through the gaps ó more like grains of rice than chunky pasta shells. And mantas donít have sticky filter mucus to snag these small particles, as sponges and bryozoans do.

Paig-Tran and her colleagues took CT scans of several manta ray species specimens from museums, then 3-D printed a replica of the filter found in one species, the giant oceanic manta ray (Manta birostris). The team placed the model filter in a tank filled with dye to track how water and planktonlike particles move through it. Computer programs also helped calculate the trajectories of particles of different sizes.

Manta rays have an unusual mouth filter that resists clogging (LINK) (https://www.sciencenews.org/article/manta-rays-have-unusual-mouth-filter-resists-clogging)

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Flying Orca
09-26-2018, 07:18 PM
That's super cool! Evolution comes up with some neat **** when it's not drunk (https://wtfevolution.tumblr.com/).

Phil Y
09-26-2018, 08:05 PM
Whereas Trump has no mouth filter at all